Internal combustion engine



FIG. 1 is a front view of an internal combustion engine of the present invention;

FIG. 2 is a rear view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a front, top and right side perspective view thereof;

FIG. 8 is a rear, bottom and right side perspective view thereof;

FIG. 9 is a perspective view showing the internal combustion engine in a use environment; and,

FIG. 10 is a perspective view showing the internal combustion engine in another use environment.

The features shown in broken lines except for portions of the internal combustion engine in FIG. 9 and FIG. 10 depict environmental subject matter only and form no part of the claimed design.

The broken lines depict portions of the internal combustion engine that form no part of the claimed design. 

CLAIM The ornamental design for an internal combustion engine, as shown and described. 